package com.pfsoft.util;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.apache.commons.lang3.time.DateFormatUtils;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Calendar;
import java.util.Hashtable;

/**
 * 生成二维码工具类
 *
 * @author hanyuelei
 */
public class QRCodeUtil {
	private static final String CHARSET = "utf-8";
	// 图片格式
	private static final String FORMAT_NAME = "jpg";
	// 二维码宽度
	private static final int QRCODE_WIDTH_SIZE = 260;
	// 二维码高度
	private static final int QRCODE_HEIGHT_SIZE = 240;
	// LOGO宽度
	private static final int WIDTH = 60;
	// LOGO高度  
	private static final int HEIGHT = 60;
	// 生成图片的目录
	//public static final String mImagesPath = "D:/usr/ehaoyao/wechatpay/images/";
	public static final String mImagesPath = "/usr/ehaoyao/data/gragh/";
	// 访问目录
	public static final String DEST_PATH_NAME = "wechatPayImage";

	/**
	 * @Description：
	 * @Author：sxl
	 * @Date：2018/2/2 16:31
	 * @param：[content, imgPath, needCompress]
	 * @return：java.awt.image.BufferedImage
	 * @throws：
	 */
	private static BufferedImage createImage(String content, String imgPath,
											 boolean needCompress) throws Exception {
		Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
		hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
		hints.put(EncodeHintType.MARGIN, 1);
		BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
				BarcodeFormat.QR_CODE, QRCodeUtil.QRCODE_WIDTH_SIZE, QRCodeUtil.QRCODE_HEIGHT_SIZE, hints);
		int width = bitMatrix.getWidth();
		int height = bitMatrix.getHeight();
		BufferedImage image = new BufferedImage(width, height,
				BufferedImage.TYPE_INT_RGB);
		for (int x = 0; x < width; x++) {
			for (int y = 0; y < height; y++) {
				image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000
						: 0xFFFFFFFF);
			}
		}
		if (imgPath == null || "".equals(imgPath)) {
			return image;
		}
		// 插入图片  
		QRCodeUtil.insertImage(image, imgPath, needCompress);
		return image;
	}

	/**
	 * 插入LOGO
	 *
	 * @param source 二维码图片
	 * @param imgPath LOGO图片地址
	 * @param needCompress 是否压缩
	 * @throws Exception
	 */
	private static void insertImage(BufferedImage source, String imgPath,
									boolean needCompress) throws Exception {
		File file = new File(imgPath);
		if (!file.exists()) {
			System.err.println("" + imgPath + "   该文件不存在！");
			return;
		}
		Image src = ImageIO.read(new File(imgPath));
		int width = src.getWidth(null);
		int height = src.getHeight(null);
		if (needCompress) { // 压缩LOGO  
			if (width > WIDTH) {
				width = WIDTH;
			}
			if (height > HEIGHT) {
				height = HEIGHT;
			}
			Image image = src.getScaledInstance(width, height,
					Image.SCALE_SMOOTH);
			BufferedImage tag = new BufferedImage(width, height,
					BufferedImage.TYPE_INT_RGB);
			Graphics g = tag.getGraphics();
			g.drawImage(image, 0, 0, null); // 绘制缩小后的图  
			g.dispose();
			src = image;
		}
		// 插入LOGO  
		Graphics2D graph = source.createGraphics();
		int x = (QRCodeUtil.QRCODE_WIDTH_SIZE - width) / 2;
		int y = (QRCodeUtil.QRCODE_HEIGHT_SIZE - height) / 2;
		graph.drawImage(src, x, y, width, height, null);
		Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
		graph.setStroke(new BasicStroke(3f));
		graph.draw(shape);
		graph.dispose();
	}

	/**
	 * 生成二维码(内嵌LOGO)
	 *
	 * @param content 内容
	 * @param imgPath LOGO地址
	 * @param destPath 存放目录
	 * @param needCompress 是否压缩LOGO
	 * @throws Exception
	 */
	public static void encode(String content, String imgPath, String destPath,
							  boolean needCompress, String name) throws Exception {
		BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
		mkdirs(destPath);
		String file = name + "." + QRCodeUtil.FORMAT_NAME;
		ImageIO.write(image, QRCodeUtil.FORMAT_NAME, new File(destPath + "/" + file));
	}


	/**
	 * 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
	 *
	 * @param destPath 存放目录
	 * @author lanyuan
	 * Email: mmm333zzz520@163.com
	 * @date 2013-12-11 上午10:16:36
	 */
	public static void mkdirs(String destPath) {
		File file = new File(destPath);
		//当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)  
		if (!file.exists() && !file.isDirectory()) {
			file.mkdirs();
		}
	}

	/**
	 * 生成二维码(内嵌LOGO)
	 *
	 * @param content 内容
	 * @param imgPath LOGO地址
	 * @param destPath 存储地址
	 * @throws Exception
	 */
	public static void encode(String content, String imgPath, String destPath, String name)
			throws Exception {
		QRCodeUtil.encode(content, imgPath, destPath, false, name);
	}

	/**
	 * 生成二维码
	 *
	 * @param content 内容
	 * @param destPath 存储地址
	 * @param needCompress 是否压缩LOGO
	 * @throws Exception
	 */
	public static void encode(String content, String destPath,
							  boolean needCompress, String name) throws Exception {
		QRCodeUtil.encode(content, null, destPath, needCompress, name);
	}

	/**
	 * 生成二维码
	 *
	 * @param content 内容
	 * @param destPath 存储地址
	 * @throws Exception
	 */
	public static void encode(String content, String destPath, String name) throws Exception {
		QRCodeUtil.encode(content, null, destPath, false, name);
	}

	/**
	 * 生成二维码(内嵌LOGO)
	 *
	 * @param content 内容
	 * @param imgPath LOGO地址
	 * @param output 输出流
	 * @param needCompress 是否压缩LOGO
	 * @throws Exception
	 */
	public static void encode(String content, String imgPath,
							  OutputStream output, boolean needCompress) throws Exception {
		BufferedImage image = QRCodeUtil.createImage(content, imgPath,
				needCompress);
		ImageIO.write(image, QRCodeUtil.FORMAT_NAME, output);
	}

	/**
	 * 生成二维码
	 *
	 * @param content 内容
	 * @param output 输出流
	 * @throws Exception
	 */
	public static void encode(String content, OutputStream output)
			throws Exception {
		QRCodeUtil.encode(content, null, output, false);
	}


}
